Patent US2542386A successfully refreshed from Google Patents.
US2542386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of plastic lenses from monomeric materials
Assignee: Individual
•
Filing: 1947-12-03
•
Granted: 1951-02-20
•
Expires: 1967-12-03
Abstract
No abstract record available.
Inventors
- 👤 John O Beattie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:39
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/0048; B29D11/00528; B29D11/00413; B29D11/00423; B29D11/00432; B29D11/00442; B29D11/00538; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2314838A
Cited
US2241415A
Cited
US2272847A
Cited
US2319014A
Cited
US2370562A
Cited
US2333051A
Cited
US2379218A
Cited
US2406361A
Cited
US2390129A
Cited
US2426402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |